kyrofa@Pandora:~$ snap interfaces
Slot                 Plug
:bluetooth-control   -
:browser-support     -
:camera              -
:cups-control        -
:firewall-control    -
:gsettings           -
:hardware-observe    -
:home                -
:locale-control      -
:log-observe         -
:modem-manager       -
:mount-observe       -
:network             -
:network-bind        -
:network-control     -
:network-manager     -
:network-observe     -
:opengl              -
:optical-drive       -
:ppp                 -
:process-control     -
:pulseaudio          -
:snapd-control       -
:system-observe      -
:system-trace        -
:timeserver-control  -
:timezone-control    -
:unity7              -
:x11                 -
kyrofa@Pandora:~$ hello-world.sh 
Launching a shell inside the default app confinement. Navigate to your
app-specific directories with:

  $ cd $SNAP
  $ cd $SNAP_DATA
  $ cd $SNAP_USER_DATA

bash-4.3$ ls /run
ls: cannot open directory '/run': Permission denied
bash-4.3$ ls /run/snapd.socket
/run/snapd.socket
bash-4.3$ echo "Huh?"
Huh?